import http from 'k6/http';
import { check, sleep, group } from 'k6';

const vus = parseInt(__ENV.TEST_VUS || '10');
const duration = __ENV.TEST_DURATION || '30s';
const targetUrl = __ENV.TARGET_URL || 'http://sonar-test-nest4.dev.svc.cluster.local:3000';

export const options = {
  scenarios: {
    load_test: {
      executor: 'ramping-vus',
      startVUs: 0,
      stages: [
        { duration: '10s', target: vus },
        { duration: duration, target: vus },
        { duration: '5s', target: 0 },
      ],
    },
  },
  thresholds: {
    http_req_duration: ['p(95)<500'],
    http_req_failed: ['rate<0.01'],
  },
};

http.setResponseCallback(http.expectedStatuses({ min: 200, max: 399 }));

export default function () {
  group('Health API', () => {
    const res = http.get(`${targetUrl}/health`);
    check(res, {
      'status is 200': (r) => r.status === 200,
      'response time < 500ms': (r) => r.timings.duration < 500,
    });
  });

  sleep(0.5);

  group('Items API', () => {
    const resGetAll = http.get(`${targetUrl}/api/items`);
    check(resGetAll, {
      'status is 200': (r) => r.status === 200,
      'response time < 500ms': (r) => r.timings.duration < 500,
      'body contains items': (r) => Array.isArray(JSON.parse(r.body)),
    });

    const resCreate = http.post(
      `${targetUrl}/api/items`,
      JSON.stringify({ name: 'Test Item', description: 'A test description' }),
      { headers: { 'Content-Type': 'application/json' } }
    );
    check(resCreate, {
      'status is 201': (r) => r.status === 201,
      'response time < 500ms': (r) => r.timings.duration < 500,
      'body contains id': (r) => JSON.parse(r.body).id !== undefined,
    });

    const itemId = JSON.parse(resCreate.body).id;

    const resGetOne = http.get(`${targetUrl}/api/items/${itemId}`);
    check(resGetOne, {
      'status is 200': (r) => r.status === 200,
      'response time < 500ms': (r) => r.timings.duration < 500,
      'body contains correct item': (r) => JSON.parse(r.body).id === itemId,
    });

    const resUpdate = http.put(
      `${targetUrl}/api/items/${itemId}`,
      JSON.stringify({ name: 'Updated Item', description: 'Updated description' }),
      { headers: { 'Content-Type': 'application/json' } }
    );
    check(resUpdate, {
      'status is 200': (r) => r.status === 200,
      'response time < 500ms': (r) => r.timings.duration < 500,
      'body contains updated item': (r) => JSON.parse(r.body).name === 'Updated Item',
    });

    const resDelete = http.del(`${targetUrl}/api/items/${itemId}`);
    check(resDelete, {
      'status is 200': (r) => r.status === 200,
      'response time < 500ms': (r) => r.timings.duration < 500,
      'body confirms deletion': (r) => JSON.parse(r.body).deleted === itemId,
    });
  });

  sleep(0.5);
}